Question - Can I hide some members from unregistered visitors and search engines?

Member

I currently have Vbulletin 3.8 (it sucks balls) and am eager to get xenforo. My only concern is this; a select few of my registered members' post activity is hidden from view from casual lurkers (hidden from unregistered visitors and search engine indexing). I did that with some custom modifications in Vbulletin.

Is there a plugin that will do the same thing in xenForo? Or is that pretty easy to program in?

Basically in VB I created a new usergroup "super members" and used an IF condition... if the visitor was unregistered, and if the post was by a super member, don't show it.